1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/PlainDate/from/argument-proto-in-calendar-fields.js b/js/src/tests/test262/built-ins/Temporal/PlainDate/from/argument-proto-in-calendar-fields.js
new file mode 100644
index 0000000000..19253021b2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/PlainDate/from/argument-proto-in-calendar-fields.js
@@ -0,0 +1,16 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-temporal.plaindate.prototype.from
+description: If a calendar's fields() method returns a field named '__proto__', PrepareTemporalFields should throw a RangeError.
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarWithExtraFields(['__proto__']);
+const arg = {year: 2023, month: 5, monthCode: 'M05', day: 1, calendar: calendar};
+
+assert.throws(RangeError, () => Temporal.PlainDate.from(arg));
+
+reportCompare(0, 0);